/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:11:08,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:11:08,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:11:08,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:11:08,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:11:08,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:11:08,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:11:08,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:11:08,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:11:08,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:11:08,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:11:08,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:11:08,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:11:08,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:11:08,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:11:08,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:11:08,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:11:08,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:11:08,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:11:08,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:11:08,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:11:08,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:11:08,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:11:08,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:11:08,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:11:08,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:11:08,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:11:08,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:11:08,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:11:08,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:11:08,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:11:08,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:11:08,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:11:08,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:11:08,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:11:08,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:11:08,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:11:08,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:11:08,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:11:08,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:11:08,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:11:08,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:11:08,382 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:11:08,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:11:08,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:11:08,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:11:08,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:11:08,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:11:08,384 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:11:08,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:11:08,384 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:11:08,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:11:08,385 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:11:08,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:11:08,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:11:08,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:11:08,385 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:11:08,385 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:11:08,385 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:11:08,385 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:11:08,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:11:08,386 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:11:08,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:11:08,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:11:08,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:11:08,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:11:08,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:11:08,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:11:08,387 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:11:08,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:11:08,387 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:11:08,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:11:08,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:11:08,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:11:08,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:11:08,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:11:08,388 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:11:08,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:11:08,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:11:08,388 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:11:08,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:11:08,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:11:08,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:11:08,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:11:08,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:11:08,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:11:08,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:11:08,594 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:11:08,595 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:11:08,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label10.c [2023-03-31 22:11:09,546 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:11:09,835 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:11:09,836 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label10.c [2023-03-31 22:11:09,848 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75a6d48f/b7783c1dcd064cc0bb84273ee5832a5e/FLAG9d996e980 [2023-03-31 22:11:09,863 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75a6d48f/b7783c1dcd064cc0bb84273ee5832a5e [2023-03-31 22:11:09,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:11:09,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:11:09,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:11:09,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:11:09,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:11:09,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:11:09" (1/1) ... [2023-03-31 22:11:09,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b1f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:09, skipping insertion in model container [2023-03-31 22:11:09,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:11:09" (1/1) ... [2023-03-31 22:11:09,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:11:09,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:11:10,093 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label10.c[4275,4288] [2023-03-31 22:11:10,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:11:10,398 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:11:10,419 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label10.c[4275,4288] [2023-03-31 22:11:10,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:11:10,553 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:11:10,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10 WrapperNode [2023-03-31 22:11:10,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:11:10,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:11:10,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:11:10,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:11:10,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,667 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:11:10,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:11:10,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:11:10,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:11:10,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (1/1) ... [2023-03-31 22:11:10,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:11:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:11:10,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:11:10,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:11:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:11:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:11:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:11:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:11:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:11:10,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:11:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:11:10,824 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:11:10,826 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:11:12,513 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:11:12,986 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:11:12,986 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:11:12,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:11:12 BoogieIcfgContainer [2023-03-31 22:11:12,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:11:12,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:11:12,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:11:12,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:11:12,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:11:09" (1/3) ... [2023-03-31 22:11:12,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1c91dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:11:12, skipping insertion in model container [2023-03-31 22:11:12,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:10" (2/3) ... [2023-03-31 22:11:12,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1c91dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:11:12, skipping insertion in model container [2023-03-31 22:11:12,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:11:12" (3/3) ... [2023-03-31 22:11:12,995 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label10.c [2023-03-31 22:11:13,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:11:13,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:11:13,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:11:13,058 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31969503, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:11:13,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:11:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:11:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:11:13,067 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:13,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:13,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:13,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash 271516867, now seen corresponding path program 1 times [2023-03-31 22:11:13,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:13,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71040393] [2023-03-31 22:11:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:13,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:13,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71040393] [2023-03-31 22:11:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71040393] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:13,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:13,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:11:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475852249] [2023-03-31 22:11:13,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:13,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:11:13,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:11:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:13,346 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:11:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:15,418 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:11:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:11:15,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:11:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:15,447 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:11:15,448 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:11:15,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:15,458 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:15,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-31 22:11:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:11:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:11:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:11:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-03-31 22:11:15,555 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-03-31 22:11:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:15,555 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-03-31 22:11:15,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:11:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-03-31 22:11:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:11:15,557 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:15,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:15,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:11:15,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:15,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1643216222, now seen corresponding path program 1 times [2023-03-31 22:11:15,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:15,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458224117] [2023-03-31 22:11:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:15,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458224117] [2023-03-31 22:11:15,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458224117] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:15,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:15,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:11:15,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700094910] [2023-03-31 22:11:15,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:15,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:11:15,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:11:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:11:15,667 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:17,641 INFO L93 Difference]: Finished difference Result 1421 states and 2520 transitions. [2023-03-31 22:11:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:11:17,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-03-31 22:11:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:17,646 INFO L225 Difference]: With dead ends: 1421 [2023-03-31 22:11:17,646 INFO L226 Difference]: Without dead ends: 957 [2023-03-31 22:11:17,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:11:17,647 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 746 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:17,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 48 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 22:11:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-03-31 22:11:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 932. [2023-03-31 22:11:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.4923245614035088) internal successors, (1361), 916 states have internal predecessors, (1361), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-03-31 22:11:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1396 transitions. [2023-03-31 22:11:17,679 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1396 transitions. Word has length 23 [2023-03-31 22:11:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:17,680 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1396 transitions. [2023-03-31 22:11:17,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1396 transitions. [2023-03-31 22:11:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 22:11:17,681 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:17,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:17,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:11:17,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:17,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash 567821186, now seen corresponding path program 1 times [2023-03-31 22:11:17,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:17,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617028448] [2023-03-31 22:11:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:17,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617028448] [2023-03-31 22:11:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617028448] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:11:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620112884] [2023-03-31 22:11:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:11:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:11:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:11:17,847 INFO L87 Difference]: Start difference. First operand 932 states and 1396 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:19,673 INFO L93 Difference]: Finished difference Result 2838 states and 4328 transitions. [2023-03-31 22:11:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:11:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-03-31 22:11:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:19,680 INFO L225 Difference]: With dead ends: 2838 [2023-03-31 22:11:19,681 INFO L226 Difference]: Without dead ends: 1911 [2023-03-31 22:11:19,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:11:19,683 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:19,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:11:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-03-31 22:11:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1660. [2023-03-31 22:11:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1613 states have (on average 1.3415995040297581) internal successors, (2164), 1634 states have internal predecessors, (2164), 13 states have call successors, (13), 13 states have call predecessors, (13), 33 states have return successors, (74), 12 states have call predecessors, (74), 12 states have call successors, (74) [2023-03-31 22:11:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2251 transitions. [2023-03-31 22:11:19,734 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2251 transitions. Word has length 35 [2023-03-31 22:11:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:19,734 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 2251 transitions. [2023-03-31 22:11:19,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2251 transitions. [2023-03-31 22:11:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-03-31 22:11:19,742 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:19,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:19,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:11:19,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:19,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash 943808755, now seen corresponding path program 1 times [2023-03-31 22:11:19,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:19,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988509004] [2023-03-31 22:11:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:19,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:11:20,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:20,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988509004] [2023-03-31 22:11:20,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988509004] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:11:20,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093382103] [2023-03-31 22:11:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:20,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:20,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:11:20,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:11:20,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:11:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:20,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:11:20,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:11:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:11:20,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:11:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:11:20,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093382103] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:11:20,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:11:20,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-03-31 22:11:20,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582130098] [2023-03-31 22:11:20,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:20,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:11:20,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:20,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:11:20,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:11:20,962 INFO L87 Difference]: Start difference. First operand 1660 states and 2251 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:22,722 INFO L93 Difference]: Finished difference Result 4952 states and 6862 transitions. [2023-03-31 22:11:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:11:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 152 [2023-03-31 22:11:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:22,739 INFO L225 Difference]: With dead ends: 4952 [2023-03-31 22:11:22,740 INFO L226 Difference]: Without dead ends: 3297 [2023-03-31 22:11:22,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:11:22,749 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 348 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:22,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 35 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:11:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2023-03-31 22:11:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 2498. [2023-03-31 22:11:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2426 states have (on average 1.3573784006595218) internal successors, (3293), 2462 states have internal predecessors, (3293), 18 states have call successors, (18), 18 states have call predecessors, (18), 53 states have return successors, (216), 17 states have call predecessors, (216), 17 states have call successors, (216) [2023-03-31 22:11:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3527 transitions. [2023-03-31 22:11:22,805 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3527 transitions. Word has length 152 [2023-03-31 22:11:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:22,806 INFO L495 AbstractCegarLoop]: Abstraction has 2498 states and 3527 transitions. [2023-03-31 22:11:22,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:22,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3527 transitions. [2023-03-31 22:11:22,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-31 22:11:22,807 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:22,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:22,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:11:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:23,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:23,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1929151890, now seen corresponding path program 1 times [2023-03-31 22:11:23,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:23,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478908233] [2023-03-31 22:11:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:23,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:11:23,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:23,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478908233] [2023-03-31 22:11:23,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478908233] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:23,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:23,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:11:23,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460511277] [2023-03-31 22:11:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:23,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:11:23,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:11:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:23,292 INFO L87 Difference]: Start difference. First operand 2498 states and 3527 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:11:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:24,517 INFO L93 Difference]: Finished difference Result 6154 states and 9040 transitions. [2023-03-31 22:11:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:11:24,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-03-31 22:11:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:24,530 INFO L225 Difference]: With dead ends: 6154 [2023-03-31 22:11:24,531 INFO L226 Difference]: Without dead ends: 3661 [2023-03-31 22:11:24,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:24,537 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:24,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:11:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2023-03-31 22:11:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3416. [2023-03-31 22:11:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3326 states have (on average 1.2934455802766085) internal successors, (4302), 3370 states have internal predecessors, (4302), 23 states have call successors, (23), 23 states have call predecessors, (23), 66 states have return successors, (323), 22 states have call predecessors, (323), 22 states have call successors, (323) [2023-03-31 22:11:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4648 transitions. [2023-03-31 22:11:24,639 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4648 transitions. Word has length 173 [2023-03-31 22:11:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:24,639 INFO L495 AbstractCegarLoop]: Abstraction has 3416 states and 4648 transitions. [2023-03-31 22:11:24,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:11:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4648 transitions. [2023-03-31 22:11:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-31 22:11:24,640 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:24,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:24,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:11:24,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:24,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash -488345814, now seen corresponding path program 1 times [2023-03-31 22:11:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:24,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693738087] [2023-03-31 22:11:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:24,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:24,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693738087] [2023-03-31 22:11:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693738087] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:11:24,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073768501] [2023-03-31 22:11:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:24,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:24,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:11:24,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:11:24,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:11:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:24,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:11:24,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:11:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:24,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:11:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:25,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073768501] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:11:25,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240993022] [2023-03-31 22:11:25,094 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:11:25,095 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:11:25,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:11:25,100 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:11:25,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:11:25,203 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:11:25,436 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-03-31 22:11:25,667 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-03-31 22:11:25,872 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8030 conjuctions. This might take some time... [2023-03-31 22:11:26,026 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 176 conjuctions. [2023-03-31 22:11:26,870 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:11:26,927 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-03-31 22:11:42,109 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33